Camera optical lens including six lenses of +++−+− refractive powers

ABSTRACT

The present disclosure relates to the field of optical lenses and provides a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens; a second lens having a positive refractive power; a third lens having a positive refractive power; a fourth lens; a fifth lens; and a sixth lens. The camera optical lens satisfies following conditions: 1.40≤f1/f2≤5.00; and 2.50≤R3/R4≤6.00. The camera optical lens can achieve a high imaging performance while obtaining a low TTL.

TECHNICAL FIELD

The present disclosure relates to the field of optical lens, and moreparticularly, to a camera optical lens suitable for handheld terminaldevices, such as smart phones or digital cameras, and imaging devices,such as monitors or PC lenses.

BACKGROUND

With the emergence of smart phones in recent years, the demand forminiature camera lens is increasing day by day, but in general thephotosensitive devices of camera lens are nothing more than ChargeCoupled Device (CCD) or Complementary Metal-Oxide Semiconductor Sensor(CMOS sensor), and as the progress of the semiconductor manufacturingtechnology makes the pixel size of the photosensitive devices becomesmaller, plus the current development trend of electronic productstowards better functions and thinner and smaller dimensions, miniaturecamera lenses with good imaging quality therefore have become amainstream in the market. In order to obtain better imaging quality, thelens that is traditionally equipped in mobile phone cameras adopts athree-piece or four-piece lens structure. Also, with the development oftechnology and the increase of the diverse demands of users, and as thepixel area of photosensitive devices is becoming smaller and smaller andthe requirement of the system on the imaging quality is improvingconstantly, the five-piece, six-piece and seven-piece lens structuresgradually appear in lens designs. There is an urgent need forultra-thin, wide-angle camera lenses with good optical characteristicsand fully corrected chromatic aberration.

BRIEF DESCRIPTION OF DRAWINGS

Many aspects of the exemplary embodiment can be better understood withreference to the following drawings. The components in the drawings arenot necessarily drawn to scale, the emphasis instead being placed uponclearly illustrating the principles of the present disclosure. Moreover,in the drawings, like reference numerals designate corresponding partsthroughout the several views.

FIG. 1 is a schematic diagram of a structure of a camera optical lens inaccordance with Embodiment 1 of the present disclosure;

FIG. 2 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 1;

FIG. 3 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 1;

FIG. 4 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 1;

FIG. 5 is a schematic diagram of a structure of a camera optical lens inaccordance with Embodiment 2 of the present disclosure;

FIG. 6 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 5;

FIG. 7 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 5;

FIG. 8 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 5;

FIG. 9 is a schematic diagram of a structure of a camera optical lens inaccordance with Embodiment 3 of the present disclosure;

FIG. 10 is a schematic diagram of a longitudinal aberration of thecamera optical lens shown in FIG. 9;

FIG. 11 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 9; and

FIG. 12 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 9.

DESCRIPTION OF EMBODIMENTS

The present disclosure will hereinafter be described in detail withreference to several exemplary embodiments. To make the technicalproblems to be solved, technical solutions and beneficial effects of thepresent disclosure more apparent, the present disclosure is described infurther detail together with the figure and the embodiments. It shouldbe understood the specific embodiments described hereby is only toexplain the disclosure, not intended to limit the disclosure.

Embodiment 1

Referring to FIG. 1, the present disclosure provides a camera opticallens 10. FIG. 1 shows the camera optical lens 10 according to Embodiment1 of the present disclosure. The camera optical lens 10 includes 6lenses. Specifically, the camera optical lens 10 includes, from anobject side to an image side, an aperture S1, a first lens L1, a secondlens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixthlens L6. An optical element such as an optical filter GF can be arrangedbetween the sixth lens L6 and an image plane Si.

The first lens L1 is made of a plastic material, the second lens L2 ismade of a plastic material, the third lens L3 is made of a plasticmaterial, the fourth lens L4 is made of a plastic material, the fifthlens L5 is made of a plastic material, and the sixth lens L6 is made ofa plastic material.

The second lens L2 has a positive refractive power, and the third lensL3 has a positive refractive power.

Herein, a focal length of the first lens L1 is defined as f1, and afocal length of the second lens L2 is defined as f2. The camera opticallens 10 should satisfy a condition of 1.40≤f1/f2≤5.00. The appropriatedistribution of the refractive power leads to a better imaging qualityand a lower sensitivity. Preferably, 2.3≤f1/f2≤4.99.

A curvature radius of the object side surface of the second lens L2 isdefined as R3, and a curvature radius of the image side surface of thesecond lens L2 is defined as R4. The camera optical lens 10 furthersatisfies a condition of 2.50≤R3/R4≤6.00, which specifies a shape of thesecond lens L2. Out of this range, a development towards ultra-thin andwide-angle lenses would make it difficult to correct the problem of anaberration. Preferably, 3.3≤R3/R4≤5.99.

A total optical length from an object side surface of the first lens L1to an image plane of the camera optical lens 10 along an optic axis isdefined as TTL. When the focal length of the first lens, the focallength of the second lens, the curvature radius of the object sidesurface of the second lens and the curvature radius of the image sidesurface of the second lens satisfy the above conditions, the cameraoptical lens will have the advantage of high performance and satisfy thedesign requirement of a low TTL.

In this embodiment, the object side surface of the first lens L1 isconvex in a paraxial region, an image side surface of the first lens L1is concave in the paraxial region, and the first lens L1 has a positiverefractive power.

A focal length of the camera optical lens 10 is defined as f, and thefocal length of the first lens L1 is defined as f1. The camera opticallens 10 further satisfies a condition of 1.92≤f1/f≤8.90, which specifiesa ratio of the focal length f1 of the first lens L1 and the focal lengthf of the camera optical lens 10. If the lower limit of the specifiedvalue is exceeded, although it would facilitate development ofultra-thin lenses, the positive refractive power of the first lens L1will be too strong, and thus it is difficult to correct the problem likethe aberration and it is also unfavorable for development of wide-anglelenses. On the contrary, if the upper limit of the specified value isexceeded, the positive refractive power of the first lens L1 wouldbecome too weak, and it is then difficult to develop ultra-thin lenses.Preferably, 3.07≤f1/f≤7.12.

A curvature radius of the object side surface of the first lens L1 isdefined as R1, and a curvature radius of the image side surface of thefirst lens L1 is defined as R2. The camera optical lens 10 furthersatisfies a condition of −26.99≤(R1+R2)/(R1−R2)≤−5.32. This canreasonably control a shape of the first lens L1 in such a manner thatthe first lens L1 can effectively correct a spherical aberration of thecamera optical lens. Preferably, −16.87≤(R1+R2)/(R1−R2)≤−6.65.

An on-axis thickness of the first lens L1 is defined as d1. The cameraoptical lens 10 further satisfies a condition of 0.02≤d1/TTL≤0.07. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.04≤d1/TTL≤0.06.

In this embodiment, an object side surface of the second lens L2 isconcave in the paraxial region, and an image side surface of the secondlens L2 is convex in the paraxial region.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the second lens L2 is f2. The camera optical lens 10further satisfies a condition of 0.60≤f2/f≤1.80. By controlling thepositive refractive power of the second lens L2 within the reasonablerange, correction of the aberration of the optical system can befacilitated. Preferably, 0.95≤f2/f≤1.44.

A curvature radius of the object side surface of the second lens L2 isdefined as R3, and a curvature radius of the image side surface of thesecond lens L2 is defined as R4. The camera optical lens 10 furthersatisfies a condition of 0.70≤(R3+R4)/(R3−R4)≤2.42. This can reasonablycontrol a shape of the second lens L2. Out of this range, a developmenttowards ultra-thin and wide-angle lenses would make it difficult tocorrect the problem of the aberration. Preferably,1.12≤(R3+R4)/(R3−R4)≤1.94.

An on-axis thickness of the second lens L2 is defined as d3. The cameraoptical lens 10 further satisfies a condition of 0.04≤d3/TTL≤0.12. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.06≤d3/TTL≤0.10.

In this embodiment, an object side surface of the third lens L3 isconcave in the paraxial region, and an image side surface of the thirdlens L3 is convex in the paraxial region.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the third lens L3 is f3. The camera optical lens 10further satisfies a condition of 0.72≤f3/f≤2.34. The appropriatedistribution of the refractive power leads to a better imaging qualityand a lower sensitivity. Preferably, 1.15≤f3/f≤1.87.

A curvature radius of the object side surface of the third lens L3 isdefined as R5, and a curvature radius of the image side surface of thethird lens L3 is defined as R6. The camera optical lens 10 furthersatisfies a condition of 2.42≤(R5+R6)/(R5−R6)≤8.98, which specifies ashape of the third lens L3. Out of this range, a development towardsultra-thin and wide-angle lenses would make it difficult to correct theproblem like an off-axis aberration. Preferably,3.87≤(R5+R6)/(R5−R6)≤7.19.

An on-axis thickness of the third lens L3 is defined as d5. The cameraoptical lens 10 further satisfies a condition of 0.06≤d5/TTL≤0.18. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.09≤d5/TTL≤0.14.

In this embodiment, an object side surface of the fourth lens L4 isconcave in the paraxial region, an image side surface of the fourth lensL4 is convex in the paraxial region, and the fourth lens L4 has anegative refractive power.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the fourth lens L4 is f4. The camera optical lens 10further satisfies a condition of −1.29≤f4/f≤−0.42. The appropriatedistribution of the refractive power leads to a better imaging qualityand a lower sensitivity. Preferably, −0.81≤f4/f≤−0.52.

A curvature radius of the object side surface of the fourth lens L4 isdefined as R7, and a curvature radius of the image side surface of thefourth lens L4 is defined as R8. The camera optical lens 10 furthersatisfies a condition of −2.88≤(R7+R8)/(R7−R8)≤−0.93, which specifies ashape of the fourth lens L4. Out of this range, a development towardsultra-thin and wide-angle lenses would make it difficult to correct theproblem like an off-axis aberration. Preferably,−1.80≤(R7+R8)/(R7−R8)≤−1.16.

An on-axis thickness of the fourth lens L4 is defined as d7. The cameraoptical lens 10 further satisfies a condition of 0.02≤d7/TTL≤0.07. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.04≤d7/TTL≤0.06.

In this embodiment, an object side surface of the fifth lens L5 isconcave in the paraxial region, an image side surface of the fifth lensL5 is convex in the paraxial region, and the fifth lens L5 has apositive refractive power.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the fifth lens L5 is f5. The camera optical lens 10further satisfies a condition of 0.28≤f5/f≤0.86. This can effectivelymake a light angle of the camera lens gentle and reduce the tolerancesensitivity. Preferably, 0.45≤f5/f≤0.69.

A curvature radius of the object side surface of the fifth lens L5 isdefined as R11, and a curvature radius of the image side surface of thefifth lens L5 is defined as R10. The camera optical lens 10 furthersatisfies a condition of 1.02≤(R9+R10)/(R9−R10)≤3.22, which specifies ashape of the fifth lens L5. Out of this range, a development towardsultra-thin and wide-angle lenses would make it difficult to correct theproblem like an off-axis aberration. Preferably,1.64≤(R9+R10)/(R9−R10)≤2.57.

A thickness on-axis of the fifth lens L5 is defined as d9. The cameraoptical lens 10 further satisfies a condition of 0.04≤d9/TTL≤0.13. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.06≤d9/TTL≤0.10.

In this embodiment, an object side surface of the sixth lens L6 isconvex in the paraxial region, an image side surface of the sixth lensL6 is concave in the paraxial region, and the sixth lens L6 has anegative refractive power.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the sixth lens L6 is f6. The camera optical lens 10further satisfies a condition of −2.14≤f6/f≤−0.70. The appropriatedistribution of the refractive power leads to a better imaging qualityand a lower sensitivity. Preferably, −1.34≤f6/f≤−0.87.

A curvature radius of the object side surface of the sixth lens L6 isdefined as R11, and a curvature radius of the image side surface of thesixth lens L6 is defined as R12. The camera optical lens 10 furthersatisfies a condition of 1.31≤(R11+R12)/(R11−R12)≤4.00, which specifiesa shape of the sixth lens L6. Out of this range, a development towardsultra-thin and wide-angle lenses would make it difficult to correct theproblem like an off-axis aberration. Preferably,2.10≤(R11+R12)/(R11−R12)≤3.20.

A thickness on-axis of the sixth lens L6 is defined as d11. The cameraoptical lens 10 further satisfies a condition of 0.03≤d11/TTL≤0.09. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.05≤d11/TTL≤0.07.

In this embodiment, the focal length of the camera optical lens 10 isdefined as f, and a combined focal length of the first lens L1 and thesecond lens L2 is f12. The camera optical lens 10 further satisfies acondition of 0.50≤f12/f≤1.60. This can eliminate the aberration anddistortion of the camera optical lens while suppressing a back focallength of the camera optical lens, thereby maintaining miniaturizationof the camera lens system. Preferably, 0.79≤f12/f≤1.28.

In this embodiment, the total optical length TTL of the camera opticallens 10 is smaller than or equal to 6.11 mm, which is beneficial forachieving ultra-thin lenses. Preferably, the total optical length TTL ofthe camera optical lens 10 is smaller than or equal to 5.84 mm.

In this embodiment, the camera optical lens 10 has a large F number,which is smaller than or equal to 2.47. The camera optical lens 10 has abetter imaging performance. Preferably, the F number of the cameraoptical lens 10 is smaller than or equal to 2.42.

With such design, the total optical length TTL of the camera opticallens 10 can be made as short as possible, and thus the miniaturizationcharacteristics can be maintained.

In the following, examples will be used to describe the camera opticallens 10 of the present disclosure. The symbols recorded in each examplewill be described as follows. The focal length, on-axis distance,curvature radius, on-axis thickness, inflexion point position, andarrest point position are all in units of mm.

TTL: Optical length (the total optical length from the object sidesurface of the first lens to the image plane of the camera optical lensalong the optic axis) in mm.

Preferably, inflexion points and/or arrest points can be arranged on theobject side surface and/or image side surface of the lens, so as tosatisfy the demand for the high quality imaging. The description belowcan be referred to for specific implementations.

The design information of the camera optical lens 10 in Embodiment 1 ofthe present disclosure is shown in Tables 1 and 2.

TABLE 1 R d nd νd S1 ∞ d0 = −0.162 R1 1.979 d1 =   0.266 nd1 1.5439 ν155.95 R2 2.296 d2 =   0.343 R3 −11.260 d3 =   0.456 nd2 1.5439 ν2 55.95R4 −1.883 d4 =   0.349 R5 −1.897 d5 =   0.659 nd3 1.5439 ν3 55.95 R6−1.247 d6 =   0.066 R7 −1.195 d7 =   0.250 nd4 1.6713 ν4 19.24 R8 −6.615d8 =   0.031 R9 −2.354 d9 =   0.445 nd5 1.6150 ν5 25.92 R10 −0.857 d10 =  0.395 R11 2.268 d11 =   0.317 nd6 1.5672 ν6 37.49 R12 1.030 d12 =  0.470 R13 ∞ d13 =   0.110 ndg 1.5168 νg 64.17 R14 ∞ d14 =   1.401

In the table, meanings of various symbols will be described as follows.

S1: aperture;

R: curvature radius of an optical surface, a central curvature radiusfor a lens;

R1: curvature radius of the object side surface of the first lens L1;

R2: curvature radius of the image side surface of the first lens L1;

R3: curvature radius of the object side surface of the second lens L2;

R4: curvature radius of the image side surface of the second lens L2;

R5: curvature radius of the object side surface of the third lens L3;

R6: curvature radius of the image side surface of the third lens L3;

R7: curvature radius of the object side surface of the fourth lens L4;

R8: curvature radius of the image side surface of the fourth lens L4;

R9: curvature radius of the object side surface of the fifth lens L5;

R10: curvature radius of the image side surface of the fifth lens L5;

R11: curvature radius of the object side surface of the sixth lens L6;

R12: curvature radius of the image side surface of the sixth lens L6;

R13: curvature radius of an object side surface of the optical filterGF;

R14: curvature radius of an image side surface of the optical filter GF;

d: on-axis thickness of a lens and an on-axis distance between lenses;

d0: on-axis distance from the aperture S1 to the object side surface ofthe first lens L1;

d1: on-axis thickness of the first lens L1;

d2: on-axis distance from the image side surface of the first lens L1 tothe object side surface of the second lens L2;

d3: on-axis thickness of the second lens L2;

d4: on-axis distance from the image side surface of the second lens L2to the object side surface of the third lens L3;

d5: on-axis thickness of the third lens L3;

d6: on-axis distance from the image side surface of the third lens L3 tothe object side surface of the fourth lens L4;

d7: on-axis thickness of the fourth lens L4;

d8: on-axis distance from the image side surface of the fourth lens L4to the object side surface of the fifth lens L5;

d9: on-axis thickness of the fifth lens L5;

d10: on-axis distance from the image side surface of the fifth lens L5to the object side surface of the sixth lens L6;

d11: on-axis thickness of the sixth lens L6;

d12: on-axis distance from the image side surface of the sixth lens L6to the object side surface of the optical filter GF;

d13: on-axis thickness of the optical filter GF;

d14: on-axis distance from the image side surface of the optical filterGF to the image plane;

nd: refractive index of d line;

nd1: refractive index of d line of the first lens L1;

nd2: refractive index of d line of the second lens L2;

nd3: refractive index of d line of the third lens L3;

nd4: refractive index of d line of the fourth lens L4;

nd5: refractive index of d line of the fifth lens L5;

nd6: refractive index of d line of the sixth lens L6;

ndg: refractive index of d line of the optical filter GF;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

v6: abbe number of the sixth lens L6;

vg: abbe number of the optical filter GF.

Table 2 shows aspherical surface data of the camera optical lens 10 inEmbodiment 1 of the present disclosure.

TABLE 2 Conic coefficient Aspherical surface coefficients k A4 A6 A8 A10A12 R1 3.9420E+00 6.7163E−02 8.4100E−02 −1.5568E−01   2.7807E−01−5.8536E−02   R2 0.0000E+00 2.0110E−01 3.0181E−01 −6.8142E−01  1.4833E+00 −1.4909E−01   R3 0.0000E+00 −1.0902E−01   −3.9522E−01  7.6270E−01 −1.8164E+00   0.0000E+00 R4 0.0000E+00 −1.5062E−01  −1.6578E−02   −5.1151E−01   7.0697E−01 −6.4195E−01   R5 0.0000E+00−2.0321E−02   1.8379E−01 −4.9100E−01   3.1656E−01 1.7084E−01 R6−6.9507E−02   −4.2186E−01   1.4146E+00 −2.0523E+00   1.6119E+00−7.4083E−01   R7 −1.8081E−01   −9.9315E−01   2.6658E+00 −3.5731E+00  3.0779E+00 −1.5712E+00   R8 0.0000E+00 2.3421E−02 −1.5598E+00  3.3915E+00 −3.5407E+00   2.1092E+00 R9 0.0000E+00 7.2236E−01−2.4112E+00   4.1024E+00 −3.7984E+00   1.4079E+00 R10 −1.6592E+00  1.6041E−01 8.6266E−02 4.0733E−02 −8.3262E−01   1.3543E+00 R11 0.0000E+002.0735E−01 −5.8157E−01   4.9279E−01 −2.0912E−01   2.2834E−02 R12−1.5217E+00   −6.0403E−02   −2.2357E−01   2.8633E−01 −1.8607E−01  7.4482E−02 Aspherical surface coefficients A14 A16 A18 A20 R1 3.5116E−02−1.3870E−01   0.0000E+00 0.0000E+00 R2 5.2959E−04 −1.8166E−04  0.0000E+00 0.0000E+00 R3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 R40.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 R5 −1.4638E−01   0.0000E+000.0000E+00 0.0000E+00 R6 1.6606E−01 0.0000E+00 0.0000E+00 0.0000E+00 R73.5543E−01 0.0000E+00 0.0000E+00 0.0000E+00 R8 −7.0168E−01   1.0187E−010.0000E+00 0.0000E+00 R9 7.1046E−01 −1.0349E+00   4.3805E−01−6.6437E−02   R10 −9.9591E−01   3.7387E−01 −6.5768E−02   3.6814E−03 R111.9159E−02 −9.4185E−03   1.7361E−03 −1.1904E−04   R12 −1.8962E−02  2.9949E−03 −2.6832E−04   1.0453E−05

Here, K is a conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18and A20 are aspheric surface coefficients.

IH: Image Heighty=(x ² /R)/[1+{1−(k+1)(x ² /R ²)}^(1/2)]+A4x ⁴ +A6x ⁶ +A8x ⁸ +A10x ¹⁰+A12x ¹² +A14x ¹⁴ +A16x ¹⁶ +A18x ¹⁸ +A20x ²⁰  (1)

For convenience, an aspheric surface of each lens surface uses theaspheric surfaces shown in the above formula (1). However, the presentdisclosure is not limited to the aspherical polynomials form shown inthe formula (1).

Table 3 and Table 4 show design data of inflexion points and arrestpoints of respective lens in the camera optical lens 10 according toEmbodiment 1 of the present disclosure. P1R1 and P1R2 represent theobject side surface and the image side surface of the first lens L1,P2R1 and P2R2 represent the object side surface and the image sidesurface of the second lens L2, P3R1 and P3R2 represent the object sidesurface and the image side surface of the third lens L3, P4R1 and P4R2represent the object side surface and the image side surface of thefourth lens L4, P5R1 and P5R2 represent the object side surface and theimage side surface of the fifth lens L5, and P6R1 and P6R2 represent theobject side surface and the image side surface of the sixth lens L6. Thedata in the column named “inflexion point position” refers to verticaldistances from inflexion points arranged on each lens surface to theoptic axis of the camera optical lens 10. The data in the column named“arrest point position” refers to vertical distances from arrest pointsarranged on each lens surface to the optic axis of the camera opticallens 10.

TABLE 3 Number of Inflexion Inflexion Inflexion inflexion point pointpoint points position 1 position 2 position 3 P1R1 0 P1R2 0 P2R1 0 P2R20 P3R1 1 0.855 P3R2 1 1.115 P4R1 1 1.065 P4R2 1 1.225 P5R1 2 1.235 1.345P5R2 2 1.105 1.435 P6R1 3 0.645 1.795 1.945 P6R2 2 0.665 2.175

TABLE 4 Number of arrest points Arrest point position 1 P1R1 0 P1R2 0P2R1 0 P2R2 0 P3R1 0 P3R2 0 P4R1 0 P4R2 0 P5R1 0 P5R2 1 1.385 P6R1 11.115 P6R2 1 1.435

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 486.1 nm, 587.6 nm and 656.3 nm afterpassing the camera optical lens 10 according to Embodiment 1. FIG. 4illustrates a field curvature and a distortion of light with awavelength of 587.6 nm after passing the camera optical lens 10according to Embodiment 1, in which a field curvature S is a fieldcurvature in a sagittal direction and T is a field curvature in atangential direction.

Table 13 shows various values of Embodiments 1, 2 and 3 and valuescorresponding to parameters which are specified in the above conditions.

As shown in Table 13, Embodiment 1 satisfies the above conditions.

In this embodiment, the entrance pupil diameter of the camera opticallens is 1.429 mm. The image height of 1.0H is 3.2376 mm. The FOV (fieldof view) is 85.54°. Thus, the camera optical lens has a wide-angle andis ultra-thin. Its on-axis and off-axis chromatic aberrations are fullycorrected, thereby achieving excellent optical characteristics.

Embodiment 2

Embodiment 2 is basically the same as Embodiment 1 and involves symbolshaving the same meanings as Embodiment 1, and only differencestherebetween will be described in the following.

Table 5 and Table 6 show design data of a camera optical lens 20 inEmbodiment 2 of the present disclosure.

TABLE 5 R d nd νd S1 ∞ d0 = −0.168 R1 1.792 d1 =   0.250 nd1 1.5439 ν155.95 R2 2.306 d2 =   0.343 R3 −7.160 d3 =   0.419 nd2 1.5439 ν2 55.95R4 −1.685 d4 =   0.291 R5 −1.635 d5 =   0.610 nd3 1.5439 ν3 55.95 R6−1.167 d6 =   0.058 R7 −1.146 d7 =   0.250 nd4 1.6713 ν4 19.24 R8 −7.043d8 =   0.030 R9 −2.422 d9 =   0.458 nd5 1.6150 ν5 25.92 R10 −0.833 d10 =  0.386 R11 2.182 d11 =   0.313 nd6 1.5672 ν6 37.49 R12 0.977 d12 =  0.421 R13 ∞ d13 =   0.110 ndg 1.5168 νg 64.17 R14 ∞ d14 =   1.350

Table 6 shows aspherical surface data of each lens of the camera opticallens 20 in Embodiment 2 of the present disclosure.

TABLE 6 Conic coefficient Aspherical surface coefficients k A4 A6 A8 A10A12 R1 3.9617E+00 6.1478E−02 8.4150E−02 −1.6751E−01   3.3465E−01−1.1252E−01   R2 0.0000E+00 2.1704E−01 2.9565E−01 −5.9808E−01  1.7123E+00 −2.8658E−01   R3 0.0000E+00 −1.3300E−01   −6.6819E−01  1.5851E+00 −3.7432E+00   0.0000E+00 R4 0.0000E+00 −1.4413E−01  −3.4313E−01   6.1804E−01 −1.5605E+00   9.0984E−01 R5 0.0000E+00−1.8322E−03   8.4122E−02 −3.0772E−01   −7.8475E−02   8.1947E−01 R6−9.6038E−02   −3.7352E−01   9.8711E−01 −8.9302E−01   3.3877E−01−2.3904E−01   R7 −1.8652E−01   −1.0442E+00   2.4868E+00 −2.2948E+00  1.0593E+00 −3.1526E−01   R8 0.0000E+00 6.9106E−02 −2.2388E+00  5.3112E+00 −5.9950E+00   3.7732E+00 R9 0.0000E+00 9.1747E−01−3.4850E+00   6.8083E+00 −7.9122E+00   5.3362E+00 R10 −1.6295E+00  2.1952E−01 2.1533E−02 2.5024E−01 −1.7236E+00   2.9509E+00 R11 0.0000E+001.9092E−01 −6.2288E−01   6.0636E−01 −3.4002E−01   1.0973E−01 R12−1.4540E+00   −1.3563E−01   −1.2000E−01   1.9853E−01 −1.3703E−01  5.6298E−02 Aspherical surface coefficients A14 A16 A18 A20 R1 7.6017E−02−3.3813E−01   0.0000E+00 0.0000E+00 R2 1.1464E−03 −4.4285E−04  0.0000E+00 0.0000E+00 R3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 R40.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 R5 −4.7781E−01   0.0000E+000.0000E+00 0.0000E+00 R6 1.5132E−01 0.0000E+00 0.0000E+00 0.0000E+00 R79.2635E−02 0.0000E+00 0.0000E+00 0.0000E+00 R8 −1.2972E+00   1.9217E−010.0000E+00 0.0000E+00 R9 −1.5051E+00   −4.3758E−01   4.2690E−01−8.5113E−02   R10 −2.4382E+00   1.0750E+00 −2.4049E−01   2.1125E−02 R11−1.5859E−02   −1.0225E−03   6.4026E−04 −5.9367E−05   R12 −1.4543E−02  2.3190E−03 −2.0925E−04   8.2024E−06

Table 7 and Table 8 show design data of inflexion points and arrestpoints of respective lens in the camera optical lens 20 according toEmbodiment 2 of the present disclosure.

TABLE 7 Number of Inflexion Inflexion Inflexion inflexion point pointpoint points position 1 position 2 position 3 P1R1 0 P1R2 0 P2R1 0 P2R20 P3R1 1 0.805 P3R2 1 1.045 P4R1 1 0.985 P4R2 1 1.185 P5R1 2 1.215 1.305P5R2 2 1.155 1.405 P6R1 3 0.625 1.775 1.935 P6R2 2 0.645 2.175

TABLE 8 Number of arrest points Arrest point position 1 P1R1 0 P1R2 0P2R1 0 P2R2 0 P3R1 0 P3R2 0 P4R1 0 P4R2 0 P5R1 0 P5R2 1 1.365 P6R1 11.085 P6R2 1 1.425

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 486.1 nm, 587.6 nm and 656.3 nm afterpassing the camera optical lens 20 according to Embodiment 2. FIG. 8illustrates a field curvature and a distortion of light with awavelength of 587.6 nm after passing the camera optical lens 20according to Embodiment 2.

As shown in Table 13, Embodiment 2 satisfies the above conditions.

In this embodiment, the entrance pupil diameter of the camera opticallens is 1.372 mm. The image height of 1.0H is 3.2376 mm. The FOV (fieldof view) is 87.80°. Thus, the camera optical lens has a wide-angle andis ultra-thin. Its on-axis and off-axis chromatic aberrations are fullycorrected, thereby achieving excellent optical characteristics.

Embodiment 3

Embodiment 3 is basically the same as Embodiment 1 and involves symbolshaving the same meanings as Embodiment 1, and only differencestherebetween will be described in the following.

Table 9 and Table 10 show design data of a camera optical lens 30 inEmbodiment 3 of the present disclosure.

TABLE 9 R d nd νd S1 ∞ d0 = −0.200 R1 1.844 d1 =   0.326 nd1 1.5439 ν155.95 R2 4.693 d2 =   0.368 R3 −3.358 d3 =   0.429 nd2 1.5439 ν2 55.95R4 −1.332 d4 =   0.080 R5 −1.516 d5 =   0.423 nd3 1.5439 ν3 55.95 R6−1.400 d6 =   0.183 R7 −1.134 d7 =   0.305 nd4 1.6713 ν4 19.24 R8 22.481d8 =   0.118 R9 8.864 d9 =   0.527 nd5 1.6150 ν5 25.92 R10 −1.375 d10 =  1.085 R11 2.942 d11 =   0.300 nd6 1.5672 ν6 37.49 R12 1.242 d12 =  0.264 R13 ∞ d13 =   0.110 ndg 1.5168 νg 64.17 R14 ∞ d14 =   0.707

Table 10 shows aspherical surface data of each lens of the cameraoptical lens 30 in Embodiment 3 of the present disclosure.

TABLE 10 Conic coefficient Aspherical surface coefficients k A4 A6 A8A10 A12 R1 3.7310E+00 7.7110E−03   6.9906E−02 −1.4295E−01     2.0571E−01−9.0495E−02   R2 0.0000E+00 1.2142E−01   1.8185E−01 −2.8415E−01    6.1220E−01 −2.3048E−01   R3 0.0000E+00 −7.2031E−02   −3.3046E−018.7920E−02 −1.0844E+00 0.0000E+00 R4 0.0000E+00 2.9649E−01 −1.8780E+003.8073E+00 −4.7004E+00 2.4926E+00 R5 0.0000E+00 4.9565E−01 −2.6710E+006.5091E+00 −9.8492E+00 9.4013E+00 R6 6.6595E−01 3.0449E−01 −1.7364E+004.6156E+00 −6.2082E+00 4.1799E+00 R7 −2.1135E−01   −3.2657E−02  −1.2774E+00 5.2751E+00 −8.0461E+00 5.5765E+00 R8 0.0000E+00−1.8590E−01   −5.0329E−01 1.1610E+00 −1.0014E+00 4.0091E−01 R90.0000E+00 1.1890E−01 −4.8810E−01 2.3172E−01   4.0401E−01 −1.1542E+00  R10 −5.8177E−01   1.5223E−01   2.6110E−02 −1.2247E−01   −1.4292E−013.2381E−01 R11 0.0000E+00 −1.8852E−01     6.8764E−03 7.3653E−03  8.5981E−03 −5.5607E−03   R12 −2.2539E+00   −1.7947E−01     4.3793E−021.4127E−02 −1.9568E−02 9.4900E−03 Aspherical surface coefficients A14A16 A18 A20 R1 5.8764E−02 −2.5123E−01   0.0000E+00 0.0000E+00 R28.8622E−04 −3.2905E−04   0.0000E+00 0.0000E+00 R3 0.0000E+00 0.0000E+000.0000E+00 0.0000E+00 R4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 R5−4.0993E+00   0.0000E+00 0.0000E+00 0.0000E+00 R6 −1.1246E+00  0.0000E+00 0.0000E+00 0.0000E+00 R7 −1.4361E+00   0.0000E+00 0.0000E+000.0000E+00 R8 −7.1502E−02   6.8462E−03 0.0000E+00 0.0000E+00 R91.5272E+00 −1.1253E+00   4.3261E−01 −6.7371E−02   R10 −1.9740E−01  4.3169E−02 2.5980E−03 −1.7657E−03   R11 7.7573E−04 1.2432E−04−4.0069E−05   2.7203E−06 R12 −2.6083E−03   4.1956E−04 −3.6768E−05  1.3586E−06

Table 11 and table 12 show design data of inflexion points and arrestpoints of respective lens in the camera optical lens 30 according toEmbodiment 3 of the present disclosure.

TABLE 11 Number of Inflexion Inflexion Inflexion inflexion point pointpoint points position 1 position 2 position 3 P1R1 0 P1R2 0 P2R1 0 P2R20 P3R1 0 P3R2 0 P4R1 1 0.895 P4R2 2 0.135 1.115 P5R1 3 0.425 1.195 1.245P5R2 2 1.115 1.415 P6R1 2 0.405 1.835 P6R2 2 0.585 2.375

TABLE 12 Number of Arrest point Arrest point arrest points position 1position 2 P1R1 0 P1R2 0 P2R1 0 P2R2 0 P3R1 0 P3R2 0 P4R1 0 P4R2 1 0.225P5R1 1 0.615 P5R2 0 P6R1 1 0.705 P6R2 2 1.215 2.515

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 486.1 nm, 587.6 nm and 656.3 nm afterpassing the camera optical lens 30 according to Embodiment 3. FIG. 12illustrates field curvature and distortion of light with a wavelength of587.6 nm after passing the camera optical lens 30 according toEmbodiment 3.

Table 13 in the following lists values corresponding to the respectiveconditions in this embodiment in order to satisfy the above conditions.The camera optical lens according to this embodiment satisfies the aboveconditions.

In this embodiment, the entrance pupil diameter of the camera opticallens is 1.514 mm. The image height of 1.0H is 3.2376 mm. The FOV (fieldof view) is 82.26°. Thus, the camera optical lens has a wide-angle andis ultra-thin. Its on-axis and off-axis chromatic aberrations are fullycorrected, thereby achieving excellent optical characteristics.

TABLE 13 Parameters and conditions Embodiment 1 Embodiment 2 Embodiment3 f 3.43 3.293 3.43 f1 20.353 12.622 20.353 f2 4.087 3.944 4.087 f34.931 5.137 4.931 f4 −2.213 −2.074 −2.213 f5 1.968 1.861 1.968 f6 −3.67−3.446 −3.67 f12 3.651 3.263 3.651 FNO 2.40 2.40 2.40 f1/f2 4.98 3.24.98 R3/R4 5.98 4.25 5.98

It can be appreciated by one having ordinary skill in the art that thedescription above is only embodiments of the present disclosure. Inpractice, one having ordinary skill in the art can make variousmodifications to these embodiments in forms and details withoutdeparting from the spirit and scope of the present disclosure.

What is claimed is:
 1. A camera optical lens, comprising, from an objectside to an image side: a first lens; a second lens having a positiverefractive power; a third lens having a positive refractive power; afourth lens; a fifth lens; and a sixth lens, wherein the camera opticallens satisfies following conditions:1.40≤f1/f2≤5.00; and2.50≤R3/R4≤6.00, where f1 denotes a focal length of the first lens; f2denotes a focal length of the second lens; R3 denotes a curvature radiusof an object side surface of the second lens; and R4 denotes a curvatureradius of an image side surface of the second lens.
 2. The cameraoptical lens as described in claim 1, further satisfying followingconditions:2.3≤f1/f2≤4.99; and3.38≤R3/R4≤5.99.
 3. The camera optical lens as described in claim 1,wherein the first lens has a positive refractive power, and comprises anobject side surface being convex in a paraxial region and an image sidesurface being concave in the paraxial region, and the camera opticallens further satisfies following conditions:1.92≤f1/f≤8.90;−26.99≤(R1+R2)/(R1−R2)≤−5.32; and0.02≤d1/TTL≤0.07, where f denotes a focal length of the camera opticallens; R1 denotes a curvature radius of the object side surface of thefirst lens; R2 denotes a curvature radius of the image side surface ofthe first lens; d1 denotes an on-axis thickness of the first lens; andTTL denotes a total optical length from the object side surface of thefirst lens to an image plane of the camera optical lens along an opticaxis.
 4. The camera optical lens as described in claim 3, furthersatisfying following conditions:3.07≤f1/f≤7.12;−16.87≤(R1+R2)/(R1−R2)≤−6.65; and0.04≤d1/TTL≤0.06.
 5. The camera optical lens as described in claim 1,wherein the object side surface of the second lens is concave in aparaxial region, and the image side surface of the second lens is convexin the paraxial region, and the camera optical lens further satisfiesfollowing conditions:0.60≤f2/f≤1.80;0.70≤(R3+R4)/(R3−R4)≤2.42; and0.04≤d3/TTL≤0.12, where f denotes a focal length of the camera opticallens; d3 denotes an on-axis thickness of the second lens; and TTLdenotes a total optical length from an object side surface of the firstlens to an image plane of the camera optical lens along an optic axis.6. The camera optical lens as described in claim 5, further satisfyingfollowing conditions:0.95≤f2/f≤1.44;1.12≤(R3+R4)/(R3−R4)≤1.94; and0.06≤d3/TTL≤0.10.
 7. The camera optical lens as described in claim 1,wherein the third lens comprises an object side surface being concave ina paraxial region and an image side surface being convex in the paraxialregion, and the camera optical lens further satisfies followingconditions:0.72≤f3/f≤2.34;2.42≤(R5+R6)/(R5−R6)≤8.98; and0.06≤d5/TTL≤0.18, where f denotes a focal length of the camera opticallens; f3 denotes a focal length of the third lens; R5 denotes acurvature radius of an object side surface of the third lens; R6 denotesa curvature radius of an image side surface of the third lens; d5denotes an on-axis thickness of the third lens; and TTL denotes a totaloptical length from an object side surface of the first lens to an imageplane of the camera optical lens along an optic axis.
 8. The cameraoptical lens as described in claim 7, further satisfying followingconditions:1.15≤f3/f≤1.87;3.87≤(R5+R6)/(R5−R6)≤7.19; and0.09≤d5/TTL≤0.14.
 9. The camera optical lens as described in claim 1,wherein the fourth lens has a negative refractive power, and comprisesan object side surface being concave in a paraxial region and an imageside surface being convex in the paraxial region, and the camera opticallens further satisfies following conditions:−1.29≤f4/f≤−0.42;−2.88≤(R7+R8)/(R7−R8)≤−0.93; and0.02≤d7/TTL≤0.07, where f denotes a focal length of the camera opticallens; f4 denotes a focal length of the fourth lens; R7 denotes acurvature radius of the object side surface of the fourth lens; R8denotes a curvature radius of the image side surface of the fourth lens;d7 denotes an on-axis thickness of the fourth lens; and TTL denotes atotal optical length from an object side surface of the first lens to animage plane of the camera optical lens along an optic axis.
 10. Thecamera optical lens as described in claim 9, further satisfyingfollowing conditions:−0.81≤f4/f≤−0.52;−1.80≤(R7+R8)/(R7−R8)≤−1.16; and0.04≤d7/TTL≤0.06.
 11. The camera optical lens as described in claim 1,wherein the fifth lens has a positive refractive power, and comprises anobject side surface being concave in a paraxial region and an image sidesurface being convex in the paraxial region, and the camera optical lensfurther satisfies following conditions:0.28≤f5/f≤0.86;1.02≤(R9+R10)/(R9−R10)≤3.22; and0.04≤d9/TTL≤0.13, where f denotes a focal length of the camera opticallens; f5 denotes a focal length of the fifth lens; R9 denotes acurvature radius of the object side surface of the fifth lens; R10denotes a curvature radius of the image side surface of the fifth lens;d9 denotes an on-axis thickness of the fifth lens; and TTL denotes atotal optical length from an object side surface of the first lens to animage plane of the camera optical lens along an optic axis.
 12. Thecamera optical lens as described in claim 11, further satisfyingfollowing conditions:0.45≤f5/f≤0.69;1.64≤(R9+R10)/(R9−R10)≤2.57; and0.06≤d9/TTL≤0.10.
 13. The camera optical lens as described in claim 1,wherein the sixth lens has a negative refractive power, and comprises anobject side surface being convex in a paraxial region and an image sidesurface being concave in the paraxial region, and the camera opticallens further satisfies following conditions:−2.14≤f6/f≤−0.70;1.31≤(R11+R12)/(R11−R12)≤4.00; and0.03≤d11/TTL≤0.09, where f denotes a focal length of the camera opticallens; f6 denotes a focal length of the sixth lens; R11 denotes acurvature radius of the object side surface of the sixth lens; R12denotes a curvature radius of the image side surface of the sixth lens;d11 denotes an on-axis thickness of the sixth lens; and TTL denotes atotal optical length from an object side surface of the first lens to animage plane of the camera optical lens along an optic axis.
 14. Thecamera optical lens as described in claim 13, further satisfyingfollowing conditions:−1.34≤f6/f≤−0.87;2.10≤(R11+R12)/(R11−R12)≤3.20; and0.05≤d11/TTL≤0.07.
 15. The camera optical lens as described in claim 1,further satisfying a following condition:0.50≤f12/f≤1.60, where f denotes a focal length of the camera opticallens; and f12 denotes a combined focal length of the first lens and thesecond lens.
 16. The camera optical lens as described in claim 15,further satisfying a following condition:0.79≤f12/f≤1.28.
 17. The camera optical lens as described in claim 1,wherein a total optical length TTL from an object side surface of thefirst lens to an image plane of the camera optical lens along an opticaxis is smaller than or equal to 6.11 mm.
 18. The camera optical lens asdescribed in claim 17, wherein the total optical length TTL of thecamera optical lens is smaller than or equal to 5.84 mm.
 19. The cameraoptical lens as described in claim 1, wherein an F number of the cameraoptical lens is smaller than or equal to 2.47.
 20. The camera opticallens as described in claim 19, wherein the F number of the cameraoptical lens is smaller than or equal to 2.42.